Facebook said it's also removing all edited versions of the video that don't show graphic content. This is being done, a New Zealand Facebook spokeswoman said, "out of respect for the people affected by this tragedy and the concerns of local authorities."

The roughly 17-minute video was downloaded from Facebook. Then it was re-uploaded to YouTube multiple times, with new posts often appearing within minutes of each other. YouTube is encouraging users to flag any videos showing this clip and said it's been removing thousands of videos related to the shooting in the last 24 hours.